Essentially all you need to do is create a copy of the object. Bodies must be in component form in order for this to work. When we work on a object which is a instance, the modification applied to this body is applied to all instances. To create an instance of a object, we can use the following steps: 1) Move the object in a component 2) Select the component (NOT the object) and copy it either by copy-paste or the CTRL-drag Move method.